2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/76701A general type of ray class fields of global function fields is investigated. The systematic computation of their genera leads to new examples of curves over finite fields with comparatively many rational points.Latex2e, 27 pages, 20 tables, revised version as submitted to Acta ArithmeticaAlgebraic Geometrytext